/*
 * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 *
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 */

package javax.swing.plaf.synth;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.BasicInternalFrameUI;
import java.beans.*;


/**
 * Provides the Synth L&amp;F UI delegate for
 * {@link javax.swing.JInternalFrame}.
 *
 * @author David Kloba
 * @author Joshua Outwater
 * @author Rich Schiavi
 * @since 1.7
 */
public class SynthInternalFrameUI extends BasicInternalFrameUI
    implements SynthUI, PropertyChangeListener {

  private SynthStyle style;

  /**
   * Creates a new UI object for the given component.
   *
   * @param b component to create UI object for
   * @return the UI object
   */
  public static ComponentUI createUI(JComponent b) {
    return new SynthInternalFrameUI((JInternalFrame) b);
  }

  protected SynthInternalFrameUI(JInternalFrame b) {
    super(b);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void installDefaults() {
    frame.setLayout(internalFrameLayout = createLayoutManager());
    updateStyle(frame);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void installListeners() {
    super.installListeners();
    frame.addPropertyChangeListener(this);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallComponents() {
    if (frame.getComponentPopupMenu() instanceof UIResource) {
      frame.setComponentPopupMenu(null);
    }
    super.uninstallComponents();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallListeners() {
    frame.removePropertyChangeListener(this);
    super.uninstallListeners();
  }

  private void updateStyle(JComponent c) {
    SynthContext context = getContext(c, ENABLED);
    SynthStyle oldStyle = style;

    style = SynthLookAndFeel.updateStyle(context, this);
    if (style != oldStyle) {
      Icon frameIcon = frame.getFrameIcon();
      if (frameIcon == null || frameIcon instanceof UIResource) {
        frame.setFrameIcon(context.getStyle().getIcon(
            context, "InternalFrame.icon"));
      }
      if (oldStyle != null) {
        uninstallKeyboardActions();
        installKeyboardActions();
      }
    }
    context.dispose();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected void uninstallDefaults() {
    SynthContext context = getContext(frame, ENABLED);
    style.uninstallDefaults(context);
    context.dispose();
    style = null;
    if (frame.getLayout() == internalFrameLayout) {
      frame.setLayout(null);
    }

  }

  /**
   * {@inheritDoc}
   */
  @Override
  public SynthContext getContext(JComponent c) {
    return getContext(c, getComponentState(c));
  }

  private SynthContext getContext(JComponent c, int state) {
    return SynthContext.getContext(c, style, state);
  }

  private int getComponentState(JComponent c) {
    return SynthLookAndFeel.getComponentState(c);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected JComponent createNorthPane(JInternalFrame w) {
    titlePane = new SynthInternalFrameTitlePane(w);
    titlePane.setName("InternalFrame.northPane");
    return titlePane;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  protected ComponentListener createComponentListener() {
    if (UIManager.getBoolean("InternalFrame.useTaskBar")) {
      return new ComponentHandler() {
        @Override
        public void componentResized(ComponentEvent e) {
          if (frame != null && frame.isMaximum()) {
            JDesktopPane desktop = (JDesktopPane) e.getSource();
            for (Component comp : desktop.getComponents()) {
              if (comp instanceof SynthDesktopPaneUI.TaskBar) {
                frame.setBounds(0, 0,
                    desktop.getWidth(),
                    desktop.getHeight() - comp.getHeight());
                frame.revalidate();
                break;
              }
            }
          }

          // Update the new parent bounds for next resize, but don't
          // let the super method touch this frame
          JInternalFrame f = frame;
          frame = null;
          super.componentResized(e);
          frame = f;
        }
      };
    } else {
      return super.createComponentListener();
    }
  }

  /**
   * Notifies this UI delegate to repaint the specified component.
   * This method paints the component background, then calls
   * the {@link #paint(SynthContext, Graphics)} method.
   *
   * <p>In general, this method does not need to be overridden by subclasses.
   * All Look and Feel rendering code should reside in the {@code paint} method.
   *
   * @param g the {@code Graphics} object used for painting
   * @param c the component being painted
   * @see #paint(SynthContext, Graphics)
   */
  @Override
  public void update(Graphics g, JComponent c) {
    SynthContext context = getContext(c);

    SynthLookAndFeel.update(context, g);
    context.getPainter().paintInternalFrameBackground(context,
        g, 0, 0, c.getWidth(), c.getHeight());
    paint(context, g);
    context.dispose();
  }

  /**
   * Paints the specified component according to the Look and Feel.
   * <p>This method is not used by Synth Look and Feel.
   * Painting is handled by the {@link #paint(SynthContext, Graphics)} method.
   *
   * @param g the {@code Graphics} object used for painting
   * @param c the component being painted
   * @see #paint(SynthContext, Graphics)
   */
  @Override
  public void paint(Graphics g, JComponent c) {
    SynthContext context = getContext(c);

    paint(context, g);
    context.dispose();
  }

  /**
   * Paints the specified component. This implementation does nothing.
   *
   * @param context context for the component being painted
   * @param g the {@code Graphics} object used for painting
   * @see #update(Graphics, JComponent)
   */
  protected void paint(SynthContext context, Graphics g) {
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void paintBorder(SynthContext context, Graphics g, int x,
      int y, int w, int h) {
    context.getPainter().paintInternalFrameBorder(context,
        g, x, y, w, h);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void propertyChange(PropertyChangeEvent evt) {
    SynthStyle oldStyle = style;
    JInternalFrame f = (JInternalFrame) evt.getSource();
    String prop = evt.getPropertyName();

    if (SynthLookAndFeel.shouldUpdateStyle(evt)) {
      updateStyle(f);
    }

    if (style == oldStyle &&
        (prop == JInternalFrame.IS_MAXIMUM_PROPERTY ||
            prop == JInternalFrame.IS_SELECTED_PROPERTY)) {
      // Border (and other defaults) may need to change
      SynthContext context = getContext(f, ENABLED);
      style.uninstallDefaults(context);
      style.installDefaults(context, this);
    }
  }
}
